Bolster-spring for vehicles



(No Model.)

0, A. HOWARD.

BOLS'I ERSPRING FOR VEHICLES.

PatentedAlig 14:, 1883'.

WITNESSES l/VVE/VTOH J; 67

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UNITED STATES P TENT OFFICE.

\ CHARLES HowAm), or PONTIAC, MICHIGAN.

BOLSTER-SPRING FOR VEHICLES.

SPECIFICATION forming part of Letters Patent No. 282,987, dated August 14,1883.

Application filed December 2, 188 2. (No model.)

To all whom it may concern.- 1

Be it known that I, OHARLEs A. HOWARD, of Pontiac, county of Oakland, State of Michigan, have invented a new and useful Improvement in Bolster-Springs for Vehicles 5 and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

My invention consists in the combination of devices and appliances hereinafter specified, and more particularly pointed out in the claim. I

In the drawings, Figure 1 is a side elevation of a device embodying my invention- Fig. 2 is a plan view with the upper cross-bar partially removed. Fig. 3 is a perspective view Fig. 4 is a variation of the elliptic cross-springs, secured in inverted po- I sition intermediate of their length, to an upper and lower cross-bar, these bars being adapted to be adjustably secured between the bolster -stakes, and provided with suitable wearing-plates for the ends of the springs.

Heretofore bolster-springs have been made consisting of a single semi-elliptic spring secured intermediate of its length to a cross-bar; but the tendency of a spring so constructed is to tilt at either side when the strain comes upon either end. By my invention, however, this difficulty is entirely overcome, as by having one or more of the springs inserted the whole acts as an equalizer, and any tilting, rocking, or sagging sidewise is thereby prevented.

In the drawings, A represents a wagon-bolster, and A the stakes. B is the upper and B the lower cross -bar. Said lower bar may be constructed of less width than the upper, if

.ward against the upper cross-bar.

lower cross-bar, its extremities projecting up- Orepresents a similar spring secured intermediate of its length firmly .to the upper cross-bar, its extremities projecting downward against the lower cross-bar. As so constructed the two springs, it will be seen, are reversed in position. The cross-bars are provided with suitable wearing-plates, b, for the ends of the springs. Said plates are preferably con structed with a recess, 6, to engage the bolsterstakes; or the wearingplates and stake-plates may be made separate.

In Fig. 3, 0 represents an additional cross spring, similar to O and C, secured intermediate of its length either to the upper or lower cross-ban. When the three are used,

one will evidently be in the center, and have i an additional spring on each side, the position of one being the reverse of that of the other two.

wish to confine myself to the use of two reversed semi-elliptic cross-springs, as my invention contemplates the use of two or more. As shown in Fig. 4, the wearing-plate is provided with a roller, D.

In the use of this device I prefer to flatten the ends of the springs, to make a suitable bearing-surface upon said rollers. It will be seen that by making the springs thin atthe ends a suitable elasticity will be given them.

I would have it understood that I do not The combination, with the'upper and lower cross-bars, of two semi elliptic springs arranged in reversedpositions, one of said springs being arranged at one side of the other, so that the ends of the lower spring bear against and directly receive the thrusts of the upper crossbar, while the ends of the upper spring bear against the lower cross-bar, substantially as shown and described.

In testimony whereof I sign this specification in the'presence of two, witnesses.

CHARLES A. HOWARD, Vitnesses:

N. S. WRIGHT, V A. E. INGLIS. 

